I'm having the same "battery balancing stuck" problem. It has happened before and is maybe triggered when the nav system forgets to shut itself off. I have taken the car in several times only to be told they cleared the OBD stored codes and all is good. Except the real problem that the battery has 50% of its rated range.
As it turns out, I was in Fort Collins a couple of days ago and the wrench came on. Mine just ticked over 8 years. I had it in to a dealer in San Diego for an oil change and asked them to check the battery died to lack of range. Turned out the warranty was expiring the next day. Same story, "battery wear and transient codes not covered".
So mine will either go into Mike Maroone (Longmont) Ford or Interstate (Dacono) Ford in the next day or two.
Whoever posted 10 years or 150,000 miles, did you get a reference for where that came from? Is that maybe a TSB to head off class action? A couple of years ago we bought an Escape Hybrid. At the time Ford was claiming that they had only ever replaced three hybrid batteries even across the hundreds of thousands of Escapes used as taxis in NYC. This sounds like a much broader issue with the second gen(?) batteries.
There used to be a battery rebuilder someplace on the west, maybe southwest, side of Denver. If Ford keeps stiffarming me, maybe I will hunt them down again. Price was significantly less than $13,000.
By the by, federal government mandates that EV builders warrantee the electrical drive components. Used to be for 80,000 miles. High voltage battery included. There are TWO manufacturers that try to end around the law by claiming that batteries are consumable parts, that battery wear is not covered by warranty. Ford is one of the two companies. The other one is ...
Tesla
The various other car companies set an expected maximum range loss by year since built. If you exceed the range loss they replace the batteries. I believe this was the intent of the federal law.